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ds18b20: add additional check for no devices found

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Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
Jon Trulson 2016-10-25 16:40:09 -06:00
parent 092f84437f
commit 1483ab6a88
1 changed files with 1 additions and 1 deletions
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src/ds18b20/ds18b20.c
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@ -144,7 +144,7 @@ ds18b20_context ds18b20_init(unsigned int uart)
rv = mraa_uart_ow_rom_search(dev->ow, 0, id); rv = mraa_uart_ow_rom_search(dev->ow, 0, id);
} }
if (!dev->numDevices) if (!dev->numDevices || !dev->devices)
{ {
printf("%s: no DS18B20 devices found on bus\n", __FUNCTION__); printf("%s: no DS18B20 devices found on bus\n", __FUNCTION__);
ds18b20_close(dev); ds18b20_close(dev);